EP0676279B1 - Matrice a avance parallele sous presse pour la formation de garnitures metalliques - Google Patents

Matrice a avance parallele sous presse pour la formation de garnitures metalliques Download PDF

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Publication number
EP0676279B1
EP0676279B1 EP93911972A EP93911972A EP0676279B1 EP 0676279 B1 EP0676279 B1 EP 0676279B1 EP 93911972 A EP93911972 A EP 93911972A EP 93911972 A EP93911972 A EP 93911972A EP 0676279 B1 EP0676279 B1 EP 0676279B1
Authority
EP
European Patent Office
Prior art keywords
die
convex
slits
bead
metallic gasket
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP93911972A
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German (de)
English (en)
Other versions
EP0676279A1 (fr
EP0676279A4 (fr
Inventor
Nobuo Yoshino
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ket and Ket KK
Original Assignee
Ket and Ket KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ket and Ket KK filed Critical Ket and Ket KK
Publication of EP0676279A1 publication Critical patent/EP0676279A1/fr
Publication of EP0676279A4 publication Critical patent/EP0676279A4/en
Application granted granted Critical
Publication of EP0676279B1 publication Critical patent/EP0676279B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D17/00—Forming single grooves in sheet metal or tubular or hollow articles
    • B21D17/02—Forming single grooves in sheet metal or tubular or hollow articles by pressing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/14—Dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00

Definitions

  • the present invention relates to a press progressive die for a metallic gasket according to the precharterizing part of claim 1.
  • a metallic gasket is interposed between joining surfaces of a cylinder head and a cylinder block of an internal combustion engine and is fastened by a bolt.
  • a die used for a processing method by way of a single step which comprises the steps of piercing and blanking each gasket by means of a single blank piercing die and thereafter beading, and a progressive beading die which comprises piercing, beading and blanking a metallic gasket by way of progressive stamping of a web-like metallic plate.
  • Figs. 5(a) and 5(b) are respectively sectional views showing essential parts of a conventional press progressive beading die.
  • an upper bead in-peripheral base plate 11 is secured to an upper holder 14a on the male side, and a convex member 18 having a predetermined pressing line for forming a convex bead is fixedly mounted in the outer periphery of the upper bead peripheral base plate 11 in such a way that the convex member 18 is projected through a predetermined width.
  • a stripper 15 adjusted in height through a stopper 17 is provided in the outer periphery of the convex member 18 in the state where the stripper 15 is resiliently urged in a pressing direction through a spring 22 relative to the upper holder 14a.
  • a lower bead in-peripheral base plate 12 is fixed internally and a die 16 is fixed externally, boring a slit 19 having a predetermined width according to the pressing line of the convex member 18 on the male side.
  • stripper 15 and the die 16 are juxtaposed to a blanking die in the press progressive die.
  • a blanking punch 20 is fixedly mounted on the upper holder 14a while being juxtaposed to the stripper 15.
  • the die 16 and the lower holder 14b are formed with blanking holes 21 for receiving a blanking punch 20. In the pressing of the blanking punch 20, the blanking punch 20 moves into the blanking hole 21 to provide a predetermined configuration of a metallic gasket in accordance with a boundary line.
  • the convex member 18 causes a metallic plate 10 to press into the slit 19 to form a convex bead 10b.
  • the lower bead in-peripheral base plate 12 is set to have the same level as the die 16.
  • the upper bead in-peripheral base plate 11 is set to have the same level as the stripper 15.
  • the piercing, the beading and the blanking of the metallic gasket can be subjected to the collective progressive stamping of a web-like metallic plate.
  • the stripper 15 always resiliently keeps the surface pressure between the former and the die 16 by the urging force of the spring 22 to prevent the occurrence of struggle and creases of a bead out-peripheral flat plate portion 10c and to press and mold the bead out-peripheral flat plate portion 10c as a part of a beading die.
  • the die 16 is merely secured in the state independently of the lower die bead base plate 14b in a narrow range between the slit 19 and the blanking hole 21, and is always in the state of being short of strength.
  • the convex member 18 presses a bead part of the metallic gasket against the slit 19 in a direction as indicated by the arrow in Fig. 5(a).
  • the width of the slit 19 between the lower bead inperipheral base plate 11 and the die 16 is forced open.
  • the die 16 is flexed toward the blanking hole 21.
  • the blanking punch 20 comes to contact with the corner of the die 16, resulting in a nicked edge.
  • the die 16 flexed on the side of the blanking hole 21 leads to a poor blanking against the blanking punch 20.
  • the die 16 is flexed in a direction of the slit 19 as indicated by the arrow by the pressing force of the blanking punch 20. Because of this, the width of the convex bead 10b becomes unstable.
  • This object is achieved by the combination of the features defined in claim 1.
  • Preferable embodiments of the invention are set forth in the subclaims.
  • a convex beading die for forming a convex bead encircling a seal part is disposed between a piercing die and a blanking die of a metallic plate.
  • a plurality of slits having a predetermined width corresponding to a width of a convex member are bored in spaced relation on a convex beading die on the female side along the pressing line opposite to a convex member on the male side provided to press and mold a convex bead on a metallic plate which has been subjected to predetermined piercing by means of a piercing die.
  • a connecting groove having a depth required to mold a bead by the convex member is bored in the same width as that of the slit between the slits. The top portion of the connecting groove may be formed into a curved angle shape.
  • a plurality of slits are partly provided along the pressing line opposite to the convex member on the male side for molding a bead.
  • a connecting groove having a depth required to mold a bead by the convex member is bored between the slits.
  • the dregs tends to stay therein.
  • the connecting grooves are limited to required locations and the tops thereof are formed into the curved angle shape, the dregs can be slipped out of the connecting grooves.
  • Fig. 1 is a plan view of a female die pressing surface of a press progressive die according to one embodiment of the present invention.
  • Fig. 2 is a schematic perspective view of the female die shown in Fig. 1.
  • Figs. 3(a) to 3(b) are respectively perspective views showing a P portion in Fig. 2 showing a processing method of a beading die according to the present invention.
  • Fig. 3(a) represents the state where slits other than connecting grooves are processed by a wire cutter or the like.
  • Fig. 3(b) represents the state where a top of the connecting groove is cut off by a discharge processing or the like.
  • Fig. 3(c) represents the state where a top of the connecting groove is cut off into a curved angle shape by a discharge processing .
  • Fig. 3(d) shows a section taken along the C1-C1 in Fig. 3(a).
  • Fig. 3(e) shows a section taken along the C2-C2 in Fig. 3(b).
  • Fig. 3(f) shows a section taken along the C3-C3 in Fig. 3(c).
  • Fig. 4(a) is a sectional view taken along A-A in Fig. 2.
  • Fig. 4(b) is a sectional view taken along B-B in Fig. 2.
  • Figs. 5(a) and 5(b) are respectively sectional views showing essential parts of the conventional beading die.
  • the press progressive die has a female die pressing surface 1.
  • a beading die 3 is disposed between a piercing die 2 and a blanking die 4.
  • On four corner portions of the die 3 are disposed guide bushes 5 for guiding a guide post of a male die.
  • numeral 2a denotes a piercing line
  • 2b denotes a bolt removing hole
  • numeral 4a designates a blanking line.
  • a convex member 18 As shown in Figs. 4(a) and 4(b), on the male side of the beading die 3 is disposed a convex member 18 according to the molding line of a convex bead 10b to be formed in the outer periphery of a pierced metallic plate 10.
  • the convex member 18 is projected to be suspended from a stopper 7 laid on an upper holder 14a through a high rigid spacer 19.
  • To the inner periphery of the convex member 18 is secured an upper bead in-peripheral base plate 11 through the spacer 19 and the stopper 17 by means of a bolt 9.
  • a projecting height of the convex member 18 is set to be projected downward by a height of the convex bead 10b to be formed from a pressing surface 11a of the upper bead in-peripheral base plate 11.
  • a stripper 15 In the outer periphery of the convex member 18 is laid a stripper 15 through a spring 22 suspended from the upper holder 14a.
  • the stripper 15 slidably moves vertically relative to the blanking punch 20 of the blanking die 4 and the convex member 18.
  • the stripper 15 is normally urged downward by the force of the spring 22 to place its pressing surface 15a above the same level as that of the pressing surface 18a of the convex member 18.
  • the stripper 15 When the metallic plate 10 is pressed, the stripper 15 is urged upward against the force of the spring 22.
  • a pressing surface 15a of the stripper 15 assumes the same level as that of the pressing surface 11a of the upper bead in-peripheral base plate 11.
  • a connecting groove 7 having a depth required to mold a bead by the convex member 18 is formed between the slits 6.
  • the connecting grooves 4 are disposed in positions obtained by equally dividing the slits 6 into four portions. However, for example, two connecting grooves 7 may be provided in each long side.
  • slits 6 according to the width of the convex bead 10b having a sectional shape as shown in Fig. 4(a) partly according to the pressing line of the convex member 18.
  • the connecting groove 7 has a sectional shape as shown in Fig. 4(a).
  • the lower bead in-peripheral base plate 12 and the die 16 are connected integral with each other by the connecting grooves 7. Since the lower bead in-peripheral base plate 12 is secured to the lower holder 14b by the bolt 8, the die 16 is also secured to the lower holder 14b by locating the lower bead in-peripheral base plate 12.
  • a die material subjected to heat treatment and both-sides grinding is first bored with slits 6 by a wire cutter or the like in the state (7a) where the connecting grooves 7 are left flat.
  • the top of the connecting groove 7 is shaved off by the discharge processing or the like in consideration of the projecting amount of the convex bead 10b.
  • the top of the connecting groove 7 is formed into a curved angle shape (7b) so as to have the shape in which the dregs on the connecting groove 7 are slipped off.
  • a convex bead 10b is formed, in a predetermined bead line, on the metallic plate 10 by the pressing of the convex member 18.
  • An in-peripheral flat plate portion 10a of the bead is pressed andformed by the pressure contact between a pair of upper and lowerbead in-peripheral base plates 11 and 12.
  • the stripper 15 always resiliently maintains the surface pressure relative to the die 16 by the urging force of the spring 22. Thereby, the struggle and creases of an out-peripheral flat portion 10c of the bead can be prevented from their occurrence. Further, the out-peripheral flat portion 10c of the bead is pressed and formed as a part of the beading die.
  • the blanking punch 20 moves into the blanking hole 21.
  • a predetermined configuration of a metallic gasket is blanked in accordance with the blanking line 4a relative to the die 16.
  • the die 16 can be connected integrally to the lower bead in-peripheral base plate 12 by the connecting grooves 7 which are disposed in several locations of the slits 6. This improves the rigidity of the die 16.
  • the slit width is also prevented from being forced open.
  • There can overcome a short of strength of the die 16 which has been a problem peculiar to the press progressive die in which the blanking die 4 is provided closely to the convex beading die 3.
  • a further stage has been heretofore provided as a play between stage 2 and stage 3 on the female side of the progressive die (see Fig. 1) in order to obtain the rigidity of the die 16.
  • the lower bead in-peripheral base plate 12 is fastened to the lower holder 14b by the bolt and at the same time the die 16 is located. Thereby, the locating work and means for the die 16 are not required.
  • connecting grooves 7 are limited to be disposed at locations of the slits 6 as required, the top thereof is formed into a curved angle shape, whereby the dregs can be slipped off from the connecting groove 7.
  • the hole and internal shape blanking step, the bead forming step and the external shape blanking step are carried out in said order. Due to the presence of the piercing step before the bead forming step, for example, the dregs in the piercing are sometimes abhered to material owing to some conditions. When this the dregs are fed to the beading step, the dregs are fallen into the bead recess groove located in the lower die (on the die side). If this groove is of the overall peripheral type connecting groove, the dregs are stayed in the groove successively. Because of this, scratches tend to occur on the concave head of the bead.
  • the slits and the connecting grooves are employed, and the staying of the dregs through a thickness portion of die material can be avoided. Even if the dregs should be fallen into the partial groove, it would be dropped into the suit due to the presence of the slits and the connecting grooves. Thereby, the above-mentioned trouble can be avoided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Gasket Seals (AREA)

Claims (7)

  1. Matrice de presse progressive servant à former une garniture métallique d'étanchéité, comprenant une matrice (3) de formation de bourrelet convexe, servant à former un bourrelet convexe (10b) qui entoure une partie joint d'une tôle métallique, ladite matrice (3) de formation de bourrelet convexe étant placée entre une matrice de poinçonnage (2) et une matrice (4) de découpage de forme extérieure, dans laquelle ladite matrice (3) de formation de bourrelet convexe comprend une pluralité de fentes (6) disposées de manière à être espacées les unes des autres pour séparer ladite matrice (16) d'une plaque de base (12) le long d'une ligne d'emboutissage faisant face à un organe convexe (18) placé du côté mâle pour emboutir et mouler ledit bourrelet convexe (10b) sur ladite tôle métallique qui a été soumise à un poinçonnage prédéterminé par ladite matrice de poinçonnage (2) et a progressivement avancé, lesdites fentes ayant une largeur prédéterminée qui correspond à la largeur dudit organe convexe (18), étant reliées par des rainures (7) qui ont la profondeur requise pour que ledit organe convexe (18) moule ladite moulure convexe (10b), et ayant la même largeur que les fentes (6),
    caractérisé en ce que lesdites fentes (6) sont percées à travers ladite matrice (3) de formation de bourrelet convexe et lesdites rainures (7) sont formées dans ladite matrice (3) de formation de bourrelet convexe, entre lesdites fentes (6) et sur la profondeur nécessaire pour mouler ledit bourrelet convexe (10b), si bien que ladite matrice (16) et ladite plaque de base (12) restent intégralement raccordées l'une à l'autre.
  2. Matrice de presse progressive servant à former une garniture métallique d'étanchéité selon la revendication 1, dans laquelle la partie supérieure desdites rainures de liaison (7) est formée avec un angle arrondi.
  3. Matrice de presse progressive servant à former une garniture métallique d'étanchéité selon la revendication 1, dans laquelle la partie supérieure desdites rainures de liaison (7) est formée pour être plate.
  4. Matrice de presse progressive servant à former une garniture métallique d'étanchéité selon la revendication 1, dans laquelle lesdites fentes (6) sont disposées suivant une configuration sensiblement rectangulaire.
  5. Matrice de presse progressive servant à former une garniture métallique d'étanchéité selon la revendication 1, dans laquelle quatre desdites fentes (6) sont disposées suivant une configuration sensiblement rectangulaire.
  6. Matrice de presse progressive servant à former une garniture métallique d'étanchéité selon la revendication 5, dans laquelle quatre rainures de liaison (7) sont disposées en des positions opposées qui divisent de manière égale lesdites fentes (6) en quatre.
  7. Matrice de presse progressive servant à former une garniture métallique d'étanchéité selon la revendication 5, dans laquelle lesdites rainures de liaison (7) sont disposées en deux endroits sur chacune des longueurs dudit rectangle.
EP93911972A 1993-05-06 1993-05-06 Matrice a avance parallele sous presse pour la formation de garnitures metalliques Expired - Lifetime EP0676279B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP1993/000595 WO1994026508A1 (fr) 1993-05-06 1993-05-06 Matrice a avance parallele sous presse pour la formation de garnitures metalliques

Publications (3)

Publication Number Publication Date
EP0676279A1 EP0676279A1 (fr) 1995-10-11
EP0676279A4 EP0676279A4 (fr) 1995-10-25
EP0676279B1 true EP0676279B1 (fr) 1998-09-09

Family

ID=14070277

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93911972A Expired - Lifetime EP0676279B1 (fr) 1993-05-06 1993-05-06 Matrice a avance parallele sous presse pour la formation de garnitures metalliques

Country Status (4)

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US (1) US5584204A (fr)
EP (1) EP0676279B1 (fr)
DE (1) DE69320988T2 (fr)
WO (1) WO1994026508A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6006563A (en) * 1997-06-17 1999-12-28 Gr Spring & Stamping, Inc. Progressive die machine and method
US6418611B1 (en) 1997-06-17 2002-07-16 Gr Spring & Stamping, Inc. Progressive die machine
DE10031095B8 (de) 2000-06-30 2011-08-04 ElringKlinger AG, 72581 Verfahren zum Herstellen einer mehrlagigen Dichtung und Dichtung
CN102814400B (zh) * 2012-08-03 2014-08-13 江苏荣腾精密组件科技股份有限公司 一种缸垫压波纹模具
CN103143603A (zh) * 2013-03-04 2013-06-12 江苏泽恩汽机车部品制造有限公司 汽车波纹片加工装置
CN104874668A (zh) * 2015-06-08 2015-09-02 上海凌云汽车模具有限公司 冲裁修边模具
CN106180336B (zh) * 2016-08-31 2018-10-23 和信精密科技（吴江）有限公司 一种翻边治具及其翻边方法
CN106623621A (zh) * 2017-01-19 2017-05-10 苏州吉润汽车零部件有限公司 用于生产汽车用腰形衬套的连续模及方法
CN112536360A (zh) * 2020-11-06 2021-03-23 谢起水 一种垫片冲压设备
CN114449820B (zh) * 2021-12-31 2023-08-18 联想(北京)有限公司 电子设备及金属壳体的制成方法

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
DE544613C (de) * 1930-05-18 1932-02-19 Ver Stahlwerke Akt Ges Vorrichtung zur Herstellung von wellenfoermigen Wasserkammern
US2150384A (en) * 1937-05-15 1939-03-14 Western Electric Co Method of forming sheet metal coin collector housings
FR1186398A (fr) * 1956-10-26 1959-08-21 Carbodies Ltd Appareil pour donner par pression une forme non plane à une tôle, notamment de véhicule automobile
JPS5113366A (ja) * 1974-07-24 1976-02-02 Kawabe Kinzoku Seisakusho Kk Junokurishikipuresukinyoru kinzokuseihinno puresukakohoho
JPS5951000A (ja) * 1982-09-14 1984-03-24 Toyota Motor Corp 順送り加工方法
JPS6152938A (ja) * 1984-08-22 1986-03-15 Nippon Metal Gasket Kk 金属ガスケットのビード形成用金型
JPS61103627A (ja) * 1984-10-27 1986-05-22 Toyota Motor Corp 自動順送り型プレス成形方法
DE3909387C1 (en) * 1989-03-22 1990-04-26 Bayerische Motoren Werke Ag, 8000 Muenchen, De Progression tool
JP2819177B2 (ja) * 1990-02-15 1998-10-30 株式会社ケットアンドケット 金属ガスケット用プレス順送型のビード成形型

Also Published As

Publication number Publication date
DE69320988T2 (de) 1999-04-01
EP0676279A1 (fr) 1995-10-11
US5584204A (en) 1996-12-17
DE69320988D1 (de) 1998-10-15
EP0676279A4 (fr) 1995-10-25
WO1994026508A1 (fr) 1994-11-24

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